315370421 has 2 divisors, whose sum is σ = 315370422. Its totient is φ = 315370420.

The previous prime is 315370403. The next prime is 315370441. The reversal of 315370421 is 124073513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 280395025 + 34975396 = 16745^2 + 5914^2 .

It is a cyclic number.

It is not a de Polignac number, because 315370421 - 2¹⁴ = 315354037 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315370441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157685210 + 157685211.

It is an arithmetic number, because the mean of its divisors is an integer number (157685211).

Almost surely, 2^315370421 is an apocalyptic number.

It is an amenable number.

315370421 is a deficient number, since it is larger than the sum of its proper divisors (1).

315370421 is an equidigital number, since it uses as much as digits as its factorization.

315370421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 315370421 is about 17758.6717127155. The cubic root of 315370421 is about 680.6758138507.

The spelling of 315370421 in words is "three hundred fifteen million, three hundred seventy thousand, four hundred twenty-one".